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QUESTION 36
Which option is recommended when gathering Optimizer system statistics on a regular basis to ensure optimal performance?
A. lock out user sessions and gather system statistics overnight
B. gather system statistics after a performance issue has been reported
C. gather system statistics for several hours when there is no workload
D. gather system statistics for several hours during normal workload periods
E. shut down any running applications prior to collection
Answer: D
Explanation:
https://docs.oracle.com/database/121/TGSQL/tgsql_stats.htm#TGSQL398
QUESTION 37
Which two statements are true about Automatic Statistics collection by the Optimizer?
A. Statistics are collected during automatic maintenance tasks.
B. Any fixed objects are disregarded.
C. Any external tables are incorporated.
D. All tables in the data dictionary are included by defaults.
E. Statistics are gathered after table statistics are marked stale.
Answer: AE
Explanation:
https://docs.oracle.com/cd/B28359_01/server.111/b28274/stats.htm
QUESTION 38
When managing multiple database instances on a single server, which initialization parameter limits the number of CPU’s that an instance can use simultaneously?
A. CPU_NUM
B. NUM_CPU
C. MAX_CPU
D. LIMIT_CPU
E. CPU_COUNT
Answer: E
Explanation:
http://docs.oracle.com/html/E25494_01/dbrm008.htm
QUESTION 39
You need to load SQL statements from a time period of optimal performance to compare against a time period that performance was reported as poor. Which functionality would you use to accomplish that task?
A. Optimizer Statistics Comparator
B. Dynamic Baseline Advisor
C. Automatic Workload Repository Baselines
D. SQL Tuning Sets
E. Database Replay
Answer: D
QUESTION 40
As of Oracle Database 12c, which functionality to access database diagnostic and performance has been superseded by Oracle Enterprise Manager Database Express?
A. SQL Developer
B. SQL Plus
C. Database Console
D. SQL Express
E. Grid Control
Answer: C
Explanation:
http://dbaora.com/enterprise-manager-database-express-oracle-database-12c-release-1-12-1/
QUESTION 41
Which option do customers need to license in order to implement SQL Performance Analyzer and Database Replay functionalities?
A. Oracle Database Diagnostics Pack for Oracle Database
B. Oracle Database Replay and Testing Suite
C. Oracle SQL Developer
D. Oracle Real Application Testing
E. Oracle SQL Tuning Pack for Oracle Database
Answer: D
Explanation:
https://docs.oracle.com/cd/B19306_01/license.102/b14199/options.htm
QUESTION 42
What two statements are true when you are using SQL Tuning Advisor and create a SQL Profile to improve performance of a SQL statement issued by a packaged application?
A. You need to regularly run SQL Tuning Advisor to verify if the SQL Profile can be replaced with a better one.
B. After a SQL Profile is created, it will then run efficiently for the life of the database.
C. The SQL Profile rewrites the SQL Statement issued by the application so it appears to the Optimizer as a perfectly written SQL statement.
D. You can have only one SQL Profile active at one time for a single SQL statement.
E. You need Oracle Database 12c or later to use SQL Profiles.
F. SQL Profiles can be used for non-Oracle databases like Microsoft SQL Server, if the Tuning Pack is licensed.
Answer: AD
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